Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0a5162b1d40078…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 02:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 0c8e7762977c9e83e4033974bee6bc70 SHA-1: 57c1dc491976c0d76ef49e15a83e297e64cc06b6 SHA-256: 1e0a5162b1d40078a9aeba6e7a92ca62a16ef71b816684a59c53aa14562cc121
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to distribute further malicious content. The presence of external URIs and a link farm indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614073899056a---joxejoromubagufop.pdf In PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/fizanojofezupuzujuwirur.pdfIn PDF document text
    • http://ergakiland.ru/files/files/funexamizerekidozikig.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/jujerevoradojijuzefa.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/20126588699.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/d66671f92107015abcd14714e0f2e7a5/teluxajibi.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/68636786678.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/24168671613.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/waraxozume.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/ropuxufepikota.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16141be73ac20d---83700515295.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/350603_73212604505.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210912_192154.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/37533988981.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/3194882586.pdfIn PDF document text
    • http://effektfilm.de/files/file/11575339538.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/84677345384.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614663786db4f---11602832126.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/kulagusegefibo.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/mivagibilejefijizi.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/riwajo.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318397072d8---8055406980.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b244f10d39---dajagekegebelilafukos.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/rupinidavejev.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/lakixovegitubutuzuf.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/2267682899.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=emulador+neo+geo+para+android+downloadPDF link annotation
    • https://lapdonline.org/file/dukigaramejapo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 22248 bytes
SHA-256: 1c1f26d6ce79fdb06ded83040c73c05dc933174b3b13bb5758762c833e3bf8c5
font_01_sfnt_off00011448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11448 10640 bytes
SHA-256: 88d0e50d333a6648cfe17cd7df1437ebb691caa84f9dba7844ac53d9ff6533aa
font_02_sfnt_off00012c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1